Ore-feeder for stamp-mills



(No Model.)

E-. W. WAGNER. ORE FEEDER FOE STAMP MILLS.

No. 244,098. Patented July 12, 1881;

I A Fig. 7. E'g. 2, H 9 H l 0 1 I Y a H 00 I. II E ImIEntur: Eb mlwn mT @jf f g Nv PETERS. Fholo-Uflwgrlplmr. Washington, D. C.

UNITED STATES PATENT OFFICE.

EDWARD W. WAGNER, OF ENTERPRISE, ASSIGNOR TO JOSHUA HENDY, OF

' SAN FRANCISCO, CALIFORNIA.

ORE-FEEDER FOR STAMP-MILLS.

SPECIFICATION forming part of Letters Patent No. 244,098, dated July 12, 1881.

Application filed September 21,1880. (No model.)

To all whom it may concern:

Be it known that I, EDWARD W. WAGNER, of Enterprise, in the county of Butte and State of California, have made and invented certain new and useful Improvements in Ore-Feeders for Stamp-Mills, which invention is fully set forth and described. in the following specification and the accompanying drawings therein referred to.

My invention relates to that class of orefeeders in which a shoe or tray suspended below the mouth of the hopper has a longitudi nal vibratory movement imparted to it for discharging the ore from its front end; and it consists in the details of construction, substantially as illustrated in the drawings and hereinafter described.

In the accompanying drawings, herein referred to as illustrating the nature of my improvements, Figure 1 shows a vertical longitudinal section of an ore -feeder with my improvements applied or combined with a hopper. Fig. 2 is a view taken from the rear of Fig. 1. Fig. 3 is a top view ofthe tray or shoe and its frame. Fig. 4 is a vertical longitudinal section through the tray. Figs. 5 and 6 show the construction of the mechanism for vibrating the tray from the stamp-stem of the battery.

In applying my improvements to an orefeeder I place the tray A in an inclined position beneath the mouth of the hopper and support or hang it upon rods or axles b I), placed beneath and across the front and rear portions of the tray. These rods extend from side to side on the, bottom of the tray and work in suitable bearings or boxes, 0 C, fixed on the bottom, and consisting preferably of lugs or open bearings, by which the tray can be readily lifted and taken out of the frame A A. The ends of these rods project a distance beyond the sides of the tray, and short suspension rods or cranks b b are either formed on them by bending up the ends of the axles b, or else separate crank-arms are employed, which are secured to the ends of the rods 1). By either construction the tray will be suspended between the short cranks b b, and when thrown backward it will move with a short vibration, and will return by its own weight to its position forward when the length of backward movement is made before the next downward movement of the stamp-stem. This manner of mounting the tray and giving it an inclined position throws the greater weight upon the front rod or axle, so that the tendency of the tray is to come to rest at the lowest point in the arc of oscillation, and the gravity of the load acts upon the tray to bring it quickly forward to this point. The ends I) b then form pivots, upon which the axles swing, and the front set of these ends or pivots I support in bearings in the side frames, A A, of the machine, while the rear ones I place in hearings in an adjustable swinging frame, D. This frame supports the rear end of the tray, and is adjustable at any required angle from the horizontal, so as to bring the trayinto the required inclinationtoward the front of the machine. It consists of the side bars, 6 e, and the rear cross-bar, f, and it is hinged or pivoted to the machine-frame A at one end, while at the op posite end it has a chain, h, which engages with a hook or catch, g, on the cross-timber of the frame, for holding it up or in the required position. In the present construction I have made the ends I) bl of the front axles serve also as pivots for the frame D by passing them through the side bars, 6 c, and then into bearings in the side frames A A but any other suitable means for hinging or pivoting this frame at one end and for holding up and adjusting its inclination at the opposite end can be employed instead of the means hereinabove described. By mounting the tray of an orefeeding machine in this way I am enabled to adjust and vary its inclination, and consequently its feeding action, in a ready and simple manner, and as often as required during the operation of the machine, without stopping or throwing any of the working parts out of action.

To give the requiredvibratory motion to the tray from the downward movements of the stamp-stem, I employ a simple and directlyacting mechanism, which I so arrange and ap ply that the work of operating the feeder is thrown upon the center rod or stem, where several stamps are employed,-or sothat the mechanism acts directly over the center of the tray, instead of at one side, by which construction and application the battery is relieved of the strain and additional friction produced, and the power is applied in a more direct manner to the tray. I place this mechanism over the tray and in front of the hopper, about midway between the side frames, A A, of the machine, and I make it of a horizontally-projecting arm or bar, H, extending forward over the center of the tray and far enough beyond the front to receive the blows of the tappet on the stamp-stem and a vertically-depending arm, I, extending downward far enough to rest against a cross-bar, K, which is secured to and across the front of the tray. This two-armed lever works on or is pivoted to a bar or shaft, L, extending between the side frames, A, across the front of the hopper, and I make it either in one piece by bending or forming a bar into the required shape and pivoting it at i to the cross-bar L, as shown at Fig. 6 of the drawings, or else I can construct it of two separate arms and connect the horizontal one to the vertically-depending one by making a slot or yoke, m, at the upper end of the arm I, and fixing in it the end of the horizontal arm by means of a screw, it, and clamping-nut n, as shown in Figs. 1 and 5. In the former construction the extent of motion of the tray is controlled by the stop X, placed above the arm H, in the usual manner, so that the movements of the tray are contracted as the stop is set down toward the arm, while in the latter construction the feed is regulated by ad justin g the horizontal arm H up or down within the yoke or connection on by means of the screw it, so that the end of the arm is struck by the tappet either sooner orlaterin the down ward movement of the stamp-stem but the tray is allowed to swing forward always to its full extent of motion.

The bar L, fixed to and across the front of the tray, receives the end of the depending arm I against it, and is provided with lugsor projections 12 12, between which the arm works. At the back of the recess between these lugs is a striking-plate, q, to receive the wear of the arm, and thus protect the cross-bar.

In machines of this class the rear edge of the hopperis usually extended or carried down lower than the front part, in order to form a hoe or scraper to act against the ore during the backward movements of the tray; but such edge was fixed and not capableof any adjustment with respect to the surface of the tray. Therefore, in making the tray adjustable in its inclination,I also provide for regulating the distance between the edge of the scraper and the tray. This I provide for by arranging upon the rear of the hopper and at the back of its mouth or discharge-opening a movable plate, R, which can be set up or down and held in position, as required, to bring the scraping-edge at the proper height above the tray-bottom. The screws or boltsss, by which it is held in place, work through slots and take into the back of the hopper, so as to hold it and allow for vertical adjustment.

The inclined tray A, I make with its bottom or ore supporting surface of two inclined planes or regular surfaces, meeting together at an angle in about the center of the tray, so that the rear part of the surface, from the end down to the middle portion, shall have a greater pitch or inclination than the remaining front portion. The tray is then placed in such position beneath the hopper that the angle where these two planes meet shall be underneath and at about the center of the mouth of the hopper, and the one at the back part of the hopper is received upon this surface of greater inclination, and caused to slide forward to the front of the tray continuously andregularly. The ore is thus prevented from choking and collecting in the mouth of the hopper, and the. action of the tray upon the ore is greatly facilitated. I make this surface of the tray either of two plates suitably joined and united together, as described, and as shown in Figs. 1 and 4, or else by bending up a plate or otherwise formingit from one piece, and along the sides I secure the pieces to extend up and embrace the sides of the hopper. To these sides A A I secure the bar K, after the manner of a bail, or so that it extends across the front of the tray, at proper distance above it to be clear of the ore and to be acted upon by the vibrating lever H I. Such construction and arrangement of the feedingtray render it more delicate and sensitive to the mechanism connected with and operated from the stamp-stem for vibrating it beneath the hopper, and cause the feed to operate equally well ,whatev'er the condition and quality of the ore, all which advantages, as well as those derived from the mode of suspending and working the tray, will be appreciated by those familiar with and experienced in the handling and feeding of ores by such machines.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In an ore feeding machine, the combination, with a longitudinally-swinging inclined feeding shoe or tray placed beneath the mouth of a hopper, of a vertically-adjustable scraper, R, at the rear of the hopper, substantially as described, for the purpose set forth.

2. In combination with an ore hopper or receptacle for discharging ore upona shoe or tray, a longitudinally-vibrating inclined feeding shoe ortray having its bottom formed of two regularly=inclined planes or surfaces, which meet together under thedischarge-opening of the hopper, and the rear one of which has a greater degree of pitch or inclination than the front one, substantially as and for the purpose set forth.

3. The combination of the cross-shaft L, the vertically-depending arm I, having the slotted box m, and the horizontally-projecting arm H,

held in and capable of vertical adjustment within the said box m by means of the adjustthe arm H with respect to the tappet on the ing-screw at, substantially as and for the purstamp-stem of the battery by which the said pose set forth. arm is actuated, substantially as and for the 4. The combination together of the crosspurposes set forth. 5 bar K, fixed to and across the front of an ore- In witness whereof I have hereunto set my I 5 feeding shoe or tray, the cross bar or shaft L hand and seal. on the feeder-frame, and the two-armed vibrat- EDWARD WILLIAM WAGNER. [L. s.] ing lever H I, supported upon and pivoted at Witnesses: the cross-bar L, and means, substantially as WARREN SExToN, 1o herein described, for controlling the position of WM. F. CLARK. 

